Help please

[Blue Triforce]

Hi if i want to join a game it says:
You cannot connect to a server which is opperating under a different protocol version

 

[cyclone4562]

It Might Be Cecause You Need To Update To Newer Versoin Your Half-Life

 

[Blue Triforce]

ok i've updated it but i can only play lan cause he says i have a wrong cd key and it's the original cd key out of the cd box